Apparatus for die-casting metals



HILL.

APPARATUS FOR DIE CASTING METALS.

APPLICATION FILED MAY 26, 1920- Patented Jan. 17, 1922.

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@313 11% Ca f/T014824 H. HILL. APPARATUS FOR DIE CASTING METALS. APPLICATION FILED MAY 25, I920.

1,403,955. A Patented Jan. 17, 1922.

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PATENT OFFICE.

HARRIET BILL, OF NEW YORK, N. Y.

APPARATUS FOR DIE-CASTING METALS.

Specification of Letters Patent.

Patented Jan. 17, 1922.

Application filed May 26, 1920. Serial No. 884,259.

To all whom it may concern:

Be it known that I, HARRIET HILL, a

citizen of the United States, residing at 301 Lexington Avenue, city, county, and State of. New York, have invented a certainnew and useful Improvement in an Apparatus for Die-Casting Metals, of which the following is a specification.

The object of my invention is an apparatus in which continuous die casting may be carried out without oxidization of the metal. The accompanying drawings will serve to illustrate my invention in which Fig. 1 is a vertical section.

Fig. 2 a (partial vertical section illustrating the feeding device in a different position from that shown in Fig. 1.

F ig.- 3 a horizontal section taken on th 1m III-III of Fig. 1.

Fig. 4 is a vertical section taken on the line IV-IV of Fig. 1, and

Fig. 5 a detail showing the casting head tilted for the p'u'rpose of removing the cast- Iteferring to the drawings: A indicates the body of the apparatus, mounted upon legs B. The body is hollow and provided with a removable cover G.' Depending from and supported by the cover 6 is a meltingpot D. The melting-pot D is adapted to be heated by gas and air by burners fed through ipe F. The melting-pot is provided wit two vertical chambers G, G two inclined chambers H, H, and a horizontal chamber I which connects the chambers H, Mounted on the .top of the cover C and over the chamber G is a metal feeding device J which ma be of any suitable construction. Thats own consists -of an inclined trough K, adapted to carry billets L by gravity. into range; with a vertically reciprocating plunger direction by the admission of com ressed air through-the valve N to the cylin er O,-and in the opposite direction by a spring P. In Fig. 2 the plunger M is shown in its up per positionand about to push one of the billets L into the chamber G and in Fig. 1 in its lower position with the billet L partially in the chamber G. The. billet L, it will be understood, has approximately the same diameter as the bore of the chamber G, so that with the billet L in position, air

cannot reach the molten metal beneath it;

Mounted on the top of the cover C and over actuated in one.

the chamber G is a casting head Q. In Fig. 1 the molten metal It is shown as filling the cavity of the casting head, having been forced therein by the action of the plunger M acting through a billet L.

I do not limit myself ..in any wise to the .details of construction of the casting head,

as such apparatus will necessarily be modi- 'fied in accordance with the articlewhich it is desired to cast The construction of the casting head, asshown in the drawings, consist of a pivoted plate S, from which depend the annular projection T, adapted to coact with a nozzle U, situated on the top of the chamber G Mounted on the top of the pivoted plate S is' a frame V on which is mounted a lever W, and slide X. The purpose of the lever W and slide X is to hold the casting mold Y in position during the casting, the position at such time being that shown in Fig. 1. When the casting is finished, the lever W is pushed backward to the position indicated by the dotted lines, Fig. 1, which raises the slide X and thereby releases the castin 5 from plate S, after which the plate g is tilted backward as shown in. Fig. 5, which brings the top of the ejector Z in contact with under portion-of frame V, thereby pushing thezcasting out of the mold Y. The operation of my improved device is as follows Assuming the chambers G, H, I, G H t be filled with molten metal, a number of billets Lare introduced into the trough K. The casting head is then put in position as shown in ig. 1. The plunger M is then actuated, which forces a billet L downward into the chamber G over the metal R, as shown in'Fig. 1. This billet, acting upon the metal in the chambers G, H, I, G H

forces the fluid metal into the cavity of the casting head and around the mold Y. The

degree of movement of the plunger M downward will, of course, depend upon .the capacity of the mold and will cease when the given that the molten metal is not exposed to the atmosphere during the operation of melting and casting, and only exposed at the upper end of the chamber G when the casting head is thrown into the position shown in Fig. 5, after the casting is finished. The surface of the metal at the top of the chamber G thus exposed, is very small and the chilled metal is, of course. re-melted when the hot metal below it is forced upward when the operation is repeated.

Having thus described my invention, I claim:

1. A casting apparatus comprising a melting-pot having two vertical chambers, two inclined chambers and a connecting chamber, means for heating the melting-pot, means for feeding billets automatically and progressively into one of the vertical chambers of the melting-pot, and a casting head situated over the opposite vertical chamber of the melting-pot.

2. A casting apparatus comprising a melting-pot, having a series of communicating chambers therein, means for heating the melting-pot and the metal contained therein, means for automatically and progressively feeding billets into one of said chambers, means for exerting pressure on a billet in a chamber and upon the molten metal under the billet, a removable casting head located over one of said chambers and adapted to receive molten metal whenprojected upward from the melting-pot.

3. A casting apparatus comprising an enclosing b dy, a melting-pot situated in said enclosing ody, means for heating the melt ing-pot, means for automatically and progressively feeding billets into the meltingpot, and situated above and external to the enclosing body, means for exerting an elastic pressure in a downward direction over a fed billet and the molten material under it, a casting head situated above and external to the enclosing body adapted to remove molten metal when projected from the casting body, together with means for removing the casting head and casting when the casting is completed.

l. A casting apparatus comprising a melting-pot. having a series of communicating chambers in which molten metal may be held without exposing it to the atmosphere, means for automatically and progressively introducing metal to be melted, means for exerting elastic pressure upon the metal in a downward direction to cause the metal to flow in an upward direction, and a casting device adapted to receive the metal flowing in an upward direction, together with means for removing the finished casting from the casting head.

5. The herein described method of die casting which consists in effecting melting of the metal to be cast under conditions where it is not exposed to the atmosphere, then automatically and progressively introducing fresh metal, then exerting elastic pressure upon the introduced fresh metal and molten metal to cause the two metals to move in a downward direction and then in an upward direction. and simultaneously the elastic pressure causing the molten metal to flow into the cavity of a mold and finally removing the cast article.

6. A casting apparatus comprising a melting-pot, and means for heating the meltingpot, an inclined trough, situated over the melting-pot, said trough adapted to receive a series of metal billets, means for automatically and progressively feeding the metal billets from the trough into the melting-pot; a casting head and means for removing the casting head to remove a casting when the casting is finished. 1

In testimony whereof, I aflix my signature, in the presence of a Witness.

HARRIET HILL.

Witness E. L. INGALLS. 

